Folding head support for wrapping machines



June 22, 194:8. o. SANDBERG FOLDING HEAD surron'r FOR WRAPPING MACHINES 2 Sheets-Sheet 1 Filed Aug. 16, 1946 QQN . 171217: for:- 0,; car 52M 10; By w June 22, 1948 o. SANDBERG FOLDING HEAD SUPPORT FOR WRAPPING MACHINES 2 Sheets-Sheet 2 Filed Aug. 16, 1946 [226222 071 fisdarfirzdberj:

Patented June 22, 1948 UNITED STATES PATENT OFFICE FOLDING HEAD SUPPORT FOR WRAPPING MACHINES Oscar Sandberg, Defiance, Ohio, assignor to Lynch Package Machinery Corporation, Toledo, Ohio, a corporation of Ohio Application August 16, 1946, Serial No. 691,081

9 Claims.

My present invention relates to a supporting means for a folding head of the rotary type disclosed in my eopen-ding application Serial No. 654,079, filed March 13, 1946.

One object of the invention is to provide a supporting means for a rotary folding head arranged so that it can be lifted to a position that permits access to the folding head and parts of the wrapping machine thereadjacent when any trouble develops such as the parts becoming clogged with a wrinkled wrapper or when the necessity for cleaning undesirable deposits from a heating shoe occurs.

Another object of the invention is to provide a support which is pivotally mounted and normally locked in a lowered position, the pivotal mounting permitting lifting of the support after it is unlocked and the support carrying with it a rotary folding head, a novel means for preventing rotation of the folding head when the support is raised being provided and means also being provided to prevent accidental energization of the motor of the wrapping machine and thereby rotation of a gear that normally rotates the folding head when the support is raised.

Still another and more specific object is to provide means to automatically lock a gear of the folding head against rotation as the support is raised and before this gear unmeshes with a drive gear, and to provide switch mechanism which breaks the circuit of the motor of the wrapping machine prior to unmeshing of the gears,

A further object is to provide means for looking the folder head support in lowered position which means is also operable to serve as a prop to retain the support in raised position while removing crumpled wrappers or cleaning the parts of the wrapping machine ordinarily inaccessible when the folding head support is in lowered or normal operating position.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my device whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, wherein:

Figure 1 is a side elevation of a portion of a wraping machine showing my rotary folding head support associated therewith and in the lowered position.

Figure 2 is a plan View of a portion of Figure 1, and

Figure 3 is a side elevation of Figure 1 on a slightly reduced scale showing the parts in a dif- 2 ferent position, the folding head support being raised in this figure.

On the accompanying drawings, I have used the reference numeral l 0 to indicate a table onto which wrappers are adapted to be fed as disclosed in my above mentioned copending application. Also as disclosed therein there is a rotary folding head indicated generally at H adapted to receive a package of cookies and a wrapper and to partially wrap the cookies into a package, following which the rotary folding head is turned a quarter turn andthe package ejected therefrom by means of an ejecting rod l2 having an ejecting plate l4. Since these parts are not the essence of the present invention they will not be described further except as to the means for effecting rotation of the head H and reciprocation of the rod 12.

During the rotationofthe head I-I it wipes the package across a heating plate [6 which serves to seal the package as the wrapper is of the type that will seal with the application of heat. The heating plate It sometimes becomes roughened by deposits of materialfrom the wrappers and requires cleaning. Also there are. times when wrappers do not feedproperly under and between rods .l'l, becoming crumpled or wrinkled, and clog in the head H or adjacent parts of the wrapping machine. It is therefore desirable to mount the head H so that it can be lifted away from the table [0 as to'the position in Figure 3 to gain access to the parts for removing deposits and/or removing crumpled wrappers.

I accordingly mount the head H on a support consisting of a frame l8 having a pivot shaft 20,, a foot 22 and a rearward extension 24. Actually.

the frame l8 isin two parts, that is, it is formed of two similar side frames. These frames are connected rigidly together by cross rods 26, 28, 39 and 32. The cross rod 32 serves as a handle to lift the frame [8 from the position of Figure 1 to the position of Figure 3 with the frame swinging about the shaft 20 as a pivot, The shaft 2!] is stationarily supported by means of brackets 34 extending upwardly from the table 10 to which they are secured.

The cross rods 25 and 32 carry a guide bar 36 on which is slidably mounted a pair of slides 38 and 40. which supports the ejector rod l2. The slide Ml supports wrapper folding mechanism and corresponds to the slide H54 in my copending application.

The slide 38 is adapted to be reciprocated throughout a long stroke by means of a link 44 The slide 38 has a depending arm 42 pivoted at its rear end thereto as indicated at 46 and pivoted to a pivot pin lit at its front end. The pivot 53 is carried by a rock arm 50 which is oscillated by a rock shaft 52. The parts 56 and 52 correspond to parts Hi5 and Id! in my pending application.

The slide til is adapted to reciprocate through a shorter stroke than the slide 38 and this is accomplished by means of a bell crank 56 pivoted to a bracket 55 that is secured to the frame H8. The bell crank 54 has a cam slot 56 in which a roller 58 is adapted to travel. The roller 58 is carried by the pin #36 of the slide 33. The bell crank 54 has a depending arm (iii to which is pivoted one end of a link 62, the pivot being shown at 64. The other end of the link is pivoted at '5 to the slide 40.

The curvature of the slot 66 is such that a long reciprocating stroke of the roller 58 will swing the long arm of the bell crank 5d a slight distance which distance is reduced by the short arm of the bell crank and transmitted to the slide 45%. Thus the stroke of the slide 35 is considerably less than the stroke of the slide 3%. The parts 38, it) and 5 l 68, find their counterpart in parts M3, M4 and HEY-I58 of my cqpending application.

Pivoted to a bracket 68 mounted on the table if] is a locking handle E6. The handle it! has a locking notch 12 adapted to coact with a pin. M projecting from theframe l8 as shownin Figure 1. The lever 76 is adapted to be unlocked from the pin M by swinging it toward the right in Figure 1. The frame l8 may then be lifted and the pin it re-engaged in a notch iii in the upper end of the handle Ill, as shownin Figure 2.

The rotary. folding head H is mounted on a shaft 18 to which is secured a gear 80. The gear 8!] normally meshes with a drive gear 82 mounted on a shaft Bil. The shaft 84 is journalled in bearings 83 extending. upwardly from the table [0, the bearings being shown broken at their lower ends on the drawings to permit illustration of the rods IT. The gear 82 corresponds to the gear 16 in my copending application wherein an intermittent drive for the shaft of this gear is fully disclosed.

During the lifting of the frame IE to the position shown in Figure 2 it is desirable to lock the gear 8!! against rotation before its teeth unmesh from the teeth of the gear 82. It is also desirable to de-energize the motor M of the wrapping machine so that it cannot be energized and thus rotate the gear 82 and get it out of time with the tooth 92 with the gear 8i! occurs before the gear 86 unmeshes from the gear 82.

When the frame [8 is lowered, a stationary pin 94 engages the bell crank 85 and rotates it counter-clockwise relative to the frame l8 thus unmeshing the tooth 92 from the gear 85. The position of the parts are. such that the unmeshing of the tooth 92 occurs after the gear 80, meshes with the gear 82 so as to insure proper retiming of the gears 8i! and 82 in relation to each other. A ter the moths! is unmeshed from. the gear '4 the switch S closes by means of the following described mechanism:

The frame l8 carries a bracket 96 in which is slidably mounted a switchpin 98. The pin 98 is biased downwardly by a spring I 00 and limited in its downward movement by a collar I112. The switch C consists of a housing. 104 in which is pivoted a switch arm 108. The switch arm 106 carries a movable contact I08 normally disengaged from a stationary contact H0 by a spring H2 that moves the switch arm I06 to a position against a stop H4 as shown in Figure 3. The spring I00 of the switch pin 98 overcomes the spring H2 in the position of Figure 1 thereby leeing the switch, After the contacts engage, the collar N2 moves away from the bracket 96, thus. insuring contact of the switch and permitting slight additional downward movement of the frame l8 thereafter.

From the foregoing description, it will be obvious that I have provided a simple means to reta n a fo ding h ad. support in t med relation to he a n ma hine me hanis yet permit lifting of the support. to a position for gaining access to mechanism that is normally inaccessible due. to th fo din head and the sup ort h r fo be n n he Way. A the same time I have provided means to prevent operation of the remaining part or the wrapping machine while the IQ- tary h ad is in the ifted position.-

The. pivot at .48 permits the link 44. to swin pwar ly whe the frame I8 swin s upwa dl and this will slightly move the slide 38, but Whlle the support is elevated-it is undesirable to actute the rock. 5i? a the lid s 38 and 0 would slide to. non-normal positions on the guide bar 36,. The swi ch S being open at this im l o insures. that thi will not occur and pos i y caus dama e to the. ma h ne- Some changes may be .made in the construction, and arrangement Of the parts of my device Without departing. from the real spirit and purpose. of-my invention, nd it ismy in en ion to cover by my claims. any modified forms of structure or use. of mechani al equivalents Which may be, reasonably included within their. scope.

I claim as my invention:

In a fol in headsupport for a wrappin mach n of th type. havin a rotary f l n he d,

. a supporting frame in which said head is journalled. saidf-r m bein pivoted to the wrappin machine and, Capable of elevation to a position for ga ning access to that portion of the wrappins ma hine underthe. fo ding h ad. a d ive sear for rotati said f ldin head, said folds ead having a gear normally m shi therewith, m a s for. lookin said. las sear a i otation. said m ans being opera le when the support is elevated. and inoperable when it is lowered, said locking means compr sing a lever ving a tooth for meshin with sa d last ar nd. sp n biased. to meshi pos t on. and a ta ionary el m n ensasi asaid leve to move to unmeshine po ition a h support i low d.

. to op ra in posi on, and m ans to lien r iz mo or ofthe'wrapp ng machin to. thereby p v rotation. of said. rive sear whenever the up s o d. a ay from sa d op ra ve P ii n. id las mea compri i a swit no m y Open, n c s by the. suppo as t is lowered to operative position.

2. Ina folding head support for a wrapping machine of the type having a rotary folding head, asup porting frame in which said head is jouralle sa d frame e ng pi e o h aprm machine and capable of elevation to a position for gaining access to that portion of the wrapping machine under the folding head, a drive gear for rotating said folding head, said folding head having a gear normally meshing therewith, and means for locking said last gear against rotation, said means being operable when the support is elevated and inoperable when it is lowered.

3. In a folding head support for a wrapping machine of the type having a rotary folding head, a supporting frame in which said head is journalled, said frame being pivoted to the wrapping machine and capable of elevation to a position for gaining access to that portion of the wrapping machine under the folding head, a drive gear for rotating said folding head, said folding head having a gear normally meshing therewith, and means for locking said last gear against rotation, said means being operable when the support is elevated and inoperable when it is lowered, said locking means comprising a lever having a tooth for meshing with said last gear and spring biased to meshing position, and a stationary element engaging said lever to move it to unmeshing position as the support is lowered to operating position.

4. In a folding head support for a wrapping machine of the type having a rotary folding head, a supporting frame in which said head is journalled, said frame being pivoted to the wrapping machine and capable of elevation to a position for gaining access to the wrapping machine under the folding head, a driving gear for rotating said folding head, said folding head having a driven gear normally meshing therewith, means for locking said driven gear against rotation, said means being operable when the support is elevated and inoperable when it is lowered, and means to de-energize the motor of the wrapping machine whenever the support is moved away from said operative position.

5. A folding head support for a wrapping machine comprising a supporting frame mounted for movement relative to the wrapping machine to a position for gaining access to parts of the wrapping machine, a driving gear for operating said folding head, said folding head having a driven gear normally meshing therewith, and means operable when the support is elevated and inoperable when it is lowered for locking said driven gear against rotation, said means comprising a lever having a tooth for meshing with said driven gear when the support is raised and out of mesh therewith when the support is lowered to operating position.

6. A folding head support for a wrapping machine comprising a supporting frame mounted for movement relative to the wrapping machine to a position for gaining access to parts of the wrapping machine, a driving gear for operating said folding head, said folding head having a driven gear normally meshing therewith, means operable when the support is elevated and inoperable when it is lowered for locking said driven gear against rotation, said means comprising a lever having a tooth for meshing with said driven gear when the support is raised and out of mesh therewith when the support is lowered to operating position, and means to render the wrapping machine and thereby said driving gear inoperable whenever the support is moved away from said operative position.

7. In a device of the class described, a folding head support for a wrapping machine, said support being mounted on the machine for movement to a position of access to parts of the machine, a folding head supported on said; support for rotation and geared to the wrapping machine, means to look the gear of the head against rotation when the support is elevated, and means operative by the position of the support to energize the motor for the wrapping machine only when said support is in its lowered operative position and said gearing means is in proper operating mesh. a

8. In a device of the class described, a folding head support for a cyclically operable wrapping machine, said support being pivotally mounted on the machine for movement to a position of access to parts of the machine, a folding head sup-ported on said support for rotation and geared to the Wrapping machine for predetermined rotation each cycle thereof, and means to lock the gear of the head against rotation when the support is elevated and unlock it for rotation from the wrapping machine when the support is relowered to operative position.

9. In a device of the class described, a folding mechanism support for a cyclically operable wrapping machine, said support being movably mounted on the machine for access to parts of the machine normally covered by said mechanism, folding mechanism supported on said support for operation and geared to the wrapping machine for predetermined rotation each cycle thereof, and means to lock the gearing of the mechanism against rotation when the support is elevated and to unlock it when the gearing is remeshed with that of the wrapping machine when said support is lowered.

OSCAR SANDBERG.

REFERENCES CITED UNITED STATES PATENTS Name Date Diehl Dec. 22, 1908 Number 

